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Micrographs of the particles from vehicle exhausts. (a) A patchwork of TXM images of the particles on 0.3 μm thick Mylar film, a particle of 3 μm size (the red arrow) was used for tomography measurement; (b) an individual micrograph of the particle measured at −83°; (c) A 3D tomographically reconstructed image of the particle. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
